| 摘要 |
<p>The invention relates to a drawing pin (10) designed for bill posting, which incorporates a nail (11) with a head (14) moulded into a plate (15) made of synthetic material, and a pointed stem (12) projecting out from the back side (17). Between the outer and inner contact surfaces (18, 20), the back side also includes a ring-shaped recess (19) with an overflow passage (22) in its bottom and an embossed inscription (23) on it. The thickness of the outer portion (30) of the plastic plate between the chamfered outer edge (31) and the outer wall of the recess (32) is basically the same as that between the bottom surface of the recess and the flat frontal surface of the plate (16). The inner contact surface (20) has another circular recess (21) around the stem (12) of the nail. The binding portion (13) between the stem (12) and the head (14) of the nail (11) is made thicker.</p> |
